Cleaned up pic of day attribution logic.
Cleaned up pic of day attribution logic.

The flag being used to determine whether the pic of day attribution was visible was being handled in a wonky manner. Also, based on this commit, no longer needed "app did resume notification" code was removed. Also, down swipe when viewing attribution now dismisses it.

wikimedia/apps-ios-commons,lyrk/Commons,nicolas-raoul/Commons,wikimedia/Commons-iOS